Wendy's topped WorldAtlas.com's list of the 10 most unhealthy fast food restaurants in the United States released last month.

The iconic restaurant edged out Sonic and Taco Bell to rank as the unhealthiest option among American fast food chains. Wendy's highest calorie item is reported to be the seasonal Pretzel Bacon Pub Triple at 1,520 calories; 106 grams of fat; 45 grams of saturated fat; five grams of trans fat; 1,940 milligrams of sodium; 54 grams of carbohydrates; four grams of fiber; six grams of sugar; and 89 grams of protein.

Wendy's also offers the Triple Baconator, which is reported to contain 1,360 calories with three burger patties, six slices of bacon, cheese, ketchup and mayonnaise.

"Wendy's square burgers and Frosty desserts create a caloric minefield," WorldAtlas.com's Nour Berjawi wrote. "A Triple Baconator meal with large fries and medium Frosty hits about 2,160 calories, 54 g saturated fat and 3,400 mg sodium, exceeding most daily limits in one sitting. Seasonal beasts like the Pretzel Bacon Pub Triple top 1,500 calories by themselves. Breakfast croissant combos, Biggie Bag bargains and late-night hours foster oversized, frequent visits, landing Wendy's firmly atop America's most waist-widening, heart-straining chains."

WorldAtlas.com's full list of the 10 most unhealthy fast food restaurants in the United States is included below:

Wendy's
Sonic
Taco Bell
Dairy Queen
KFC
Quiznos
McDonald's
Smashburger
Little Caesars
Chick-Fil-A